Mr. Heater, MH18CH, 18,000 BTU, Propane Cabinet Heater, Adjustable High, Medium & Low Settings Range From 18,000 To 12,000 To 6,000 BTU's, Auto Low Oxygen Shut Off System, Tip Over Safety Shut Off Switch, Hose & Regulator Included, No Electricity Required, Operates On 20 LB Cylinder, CSA Certified.